/**
 * BibSonomy Search - Helper classes for search modules.
 *
 * Copyright (C) 2006 - 2016 Knowledge & Data Engineering Group,
 *                               University of Kassel, Germany
 *                               http://www.kde.cs.uni-kassel.de/
 *                           Data Mining and Information Retrieval Group,
 *                               University of Würzburg, Germany
 *                               http://www.is.informatik.uni-wuerzburg.de/en/dmir/
 *                           L3S Research Center,
 *                               Leibniz University Hannover, Germany
 *                               http://www.l3s.de/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.bibsonomy.search.index.generator;

import org.bibsonomy.search.management.database.DatabaseInformationLogic;

import java.util.List;

/**
 * interface for retrieving all necessary information for generating an index
 * @param <T>
 */
public interface IndexGenerationLogic<T> extends DatabaseInformationLogic {

	/**
	 * @return the number of entities to insert into the index
	 * (used for progress)
	 */
	int getNumberOfEntities();

	/**
	 * retrieve entities
	 * @param lastContenId
	 * @param limit
	 * @return limit entities starting with last contetn id creater than the provided
	 */
	List<T> getEntites(int lastContenId, int limit);
}
